1/2" tubing stretch limits

[needmorstuff]

will 1/2" tubing fit over a 15mm copper plumbing pipe?
also will it fit over my pump inlet - it is 18mm(od)? (iwaki pump) or can i get some say 5/8 tubing and a reducer from somewhere.?

[nikhsub1]

It will fit just fine.

[needmorstuff]

excellent.

[eXa]

1\2id is about 12.7mm btw...

[needmorstuff]

true enough.. that little bit extra girth always helps.